Workout

Warm-up (500)
200 swim/ 50 Kick  (repeat)

Set (800)
4 x 100 on 1:45
...25 drill/25 swim 
...IM order
4 x 100 free on 1:30

Set (1500)
3 rounds
4 x 25 build on :30
3 x 50 ez on 1:00
2 x 75 fast on 1:00
1 x 100 ez on 2:00

Set (200)
8 x 25 
...odd Sprint on :20
...even ez on :40
 
Cool-down (200)
200 EZ